140765690 has 32 divisors (see below), whose sum is σ = 274062096. Its totient is φ = 51747840.

The previous prime is 140765689. The next prime is 140765701. The reversal of 140765690 is 96567041.

It can be written as a sum of positive squares in 8 ways, for example, as 101465329 + 39300361 = 10073^2 + 6269^2 .

It is a super-2 number, since 2×140765690² = 39629958962352200, which contains 22 as substring.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29084 + ... + 33576.

Almost surely, 2^140765690 is an apocalyptic number.

140765690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

140765690 is a deficient number, since it is larger than the sum of its proper divisors (133296406).

140765690 is a wasteful number, since it uses less digits than its factorization.

140765690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4754.

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 140765690 is about 11864.4717539383. The cubic root of 140765690 is about 520.1943184019.

The spelling of 140765690 in words is "one hundred forty million, seven hundred sixty-five thousand, six hundred ninety".